Vehicle-spring



(No Model.)v

E. COOK.

VEHICLE SPRING.

110.414,8'76. Patented Nov. 12,1889.

N. PETERS, PholLilhogr-pben Wnshngfon. D. C

UNITED STATES PATENT OFFICE.

EUGENE COOK, OF KALMAZOO, MICHIGAN.

VEHICLE-SPRING.

SPECIFICATION forming part of Letters Patent No. 414,876, dated November12, `1889.

Application tiled March '7, 1889. Serial No. 302,251. (No model.)

' which the following is a specification.

This invention relates to that class of fourwheeled vehicles in whichspiral springs are employed to elastically support the body.

The object of the invention is to construct a spring comprising ahorizontal spiral and a peculiarly-formed connected elastic loopdesigned to effect a more desirable spring action in relation tothevarying weights of the burden being borne by the spring, and to modifyor cushion the reaction of the spiral by means of said loop.

In the drawings forming a part of this specification, Figure l is aninverted plan of vone end, showing two springs attached to the underside of the body, the other end of the body (not here shown) being ofcourse a duplicate of Fig. 1; Fig. 2, a side elevation showing a changein the location of the spring; Fig. 3, a side elevation of the spring,looking from a point below Fig. 4.; and Fig. 4E is a plan of the springin Fig. 3. The two latter figures are enlarged.

Referring to the lettered parts of the drawings,'the horizontally-spiralpart of the spring is shown at B. The bar of which the spring iscomposed may ber square, angular, round, or any suitable form incross-section. The bar at one end of the spiral B is extended, as at S,forming a portion for attaching to the body D at e. The end S may beattached to the body at another point, as at o, Figs. l and 3,ifdesired. The bar at the other end of the spiral B is carried back in adirection opposite to that of the end S, and is bent around,

forming a loop C, and thence extends beneath the end S, as s, and beyondthe saine to the side bar r in Fig. l, or to the bolster cor axle, as inFig. 2, or to any suitable support disconnected from the body D. The endpart of a is hinged or pivoted to its support, but needs no swingingshackle or link connection at this point.

i In Fig. 3 it will be seen that part of the loop rests against theunder side of the body,

and that the side of the loop which is extended into the bar a graduallydrops away from the body from the point of contact with the body at theleft hand in said Fig. 3 when in its normal position, and also when theburden in the vehicle is comparatively light.

The elastic action of the spring is in the spiral, the loop, and a partof the extended portion a. The action on the spiral of course expandsand contracts the same, while the action on the loop is to twisthth'emetal forming the same, and the action on the part a springs itvertically. The spring action is so distributed over or into theserespective parts that there is less direct action of the spiral orstrain upon the same, and the ordinary shock of the reaction of thespiral is lessened or cushioned because of this distribution and thecorrelation of the described spring action of the different parts of thespring.

The advantage of having the parts S ct one over the other is that thespring is balanced and less liable to cant over when under strain.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

A Vehicle-spring comprising the elastic bar formed into a horizontalspiral, the bar at one end of said spiral being extended back and loopedaround one side of the spiral, thence forward past the opposite endthereof, forming an end for attachment to a support disconnected fromthe vehicle-body, the bar at said opposite end of the spiral beingextended for attachment to a vehicle-body, substantially asset forth.

In testimony of the foregoing I have hereunto subscribed my name inpresence of two witnesses.

EUGENE COOK.

Witnesses:

S. N. BURKE, P. H. BURKE.

